Grinding-mill



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G 8; A. RAYMOND.

GRINDING MILL.

No. 397,818. V Patented Feb. 12, 1889.

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' GRINDING MILL.

No. 397,818. Patented Feb. 12, 1889.

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GRINDING MILL.

'No. 397,818. Patentedfeb. 12, 1889.

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GRINDING MILL.

Patented Feb. 12, 1889.

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U iTEn STATES PATENT OEEIQE.

GEORGE RAYMOND AND ALBERT RAYMOND, OF CHICAGO, ILLINOIS, ASSIGNORS TO THE APPLETON MANUFACTURING COMPANY, OF

APPLETON, VISCONSIN.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 397,818, dated February 12, 1889.

Application filed June 11, 1887. Serial No. 241,002. (No model.)

T 0 all whom it may concern.-

Be it known that we, GEORGE RAYMOND and ALBERT RAYMOND, citizens of the United States, and residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Grinding-"Wills, which we desire to protect by Letters Patent of the United States, and of which the following is a specification.

The purpose of our invention is to construct a mill that will afford greater convenience in applying or removing parts of the mechanism than is found in mills of ordinary con struction, and is also designed to simplify and render the same more efficient in their operation.

In the drawings accompanying this specification and making a part thereof, Figure 1 is a side elevation. tical section. Fig. 3 is a plan view with some of the parts omitted. Figs. 4 and 5 show both faces of a disk or plate to which the rotating grindingdisk is attached, and Fig. 6 represents a cap covering the grinding-disks.

The supporting structure of the mill is represented by'an upright casting, A, supported upon the base A. The upper portion of upright A is hollow or trough-shaped longitudinally and has lateral flange formations a, as shown in Fig. 3. At a. a deeper depression occurs in casting A, which forms the lower half of the cavity or covering of the grindingdisks. From a outwardly, with its former dimensions at first resumed, casting A terminates in that direction in a journal-bearing portion, 1). At the opposite end of casting A is also a journal-bearing portion b. A shaft, B, has its bearings in suitable boxes, H and H, at the parts 1) and b, by which the necessary rotary movement may be given to the mill in its grinding capacity.

Centrally of the hollow portion of casting A is located a removable hollow cylinder, B, through which the shaft 13 extends concentrically. The cylinder B corresponds in diameter to the hollow of the casting in which it is seated, and is circumferentiallyretained in position by lugs a, formed thereon. At one end of cylinder B is formed the circular Fig. 2 is a longitudinal ververtical flange e, to which the stationary grinding-disk e is attached. A shoulder, 2', on the inner surface of flange e bears against casting A and serves to retain cylinder B in position longitudinally.

On shaft B, within cylinder B, is located a spiral conveyor, 0, preferably cast upon a sleeve, which latter is slipped over shaft B and keyed for its retention on the latter.

The vertical plate E, to which the rotating grinding-disk j is attached, is provided with a hub or sleeve, j, cast integral therewith, through a suitably-threaded aperture in which a set-screw, d, is inserted, whereby said plate E is secured on shaft B. The outer surface of plate E, as shown in Fig. 4, has radial ribs a cast thereon and extending beyond the periphery of said plate for the purpose of pre venting any accumulation of material within the grinding-disk chamber. On the interior of the said plate, as shown in Fig. 5, are provided short radial ribs 91, that revolve within the eye of the stationary grinding-disk, also for the purpose of preventing accumulations.

At the outer end, b, of casting A is an angle-plate, on, having its extremities in contact with the main casting, which are respectively provided with apertures fitting on extended bolts 1, the latter being secured to casting A. Between the outer surfaces of the ends of plate on and the head of the bolts are introduced spiral springs 1 Through the outer portion of plate m horizontally is inserted a set-screw, .9, having its threads mated by a suitably-threaded aperture in the plate. IVithin the angular format-ion of plate m is placed a box, w, in which is supported the follower 'v. The latter is interposed between set-screw s and the end of shaft B, and serves as a bearing between the two, and receives the contact when said screw is advanced.

Cylinder B is provided with a square open ing centrally of its top, the boundaries of which are vertically-projecting flanges q, cast integral with said cylinder. On flanges q the discharge portion of hopper F is seated, where the latter is secured by bolts 7". The angles of flanges q are provided with lugs y, extending above the upper surface as a means for properly seating the hopper. The upper sur face of flanges (a of casting A exterior to the grinding-disk is provided with ribs g, outlining and forming the boundaries of the seat of a cap or covering, (l, whereby the position of the latter determined. (ap G is flanged and is further secured in position by bolts 3,

extending through the flange (L and having their upper ends bent to turn on or ollf said cap-flanges with a nut, respectively, on the lower end, to permit a tightening or loosening thereof. A shake-arm for the shoe I is designated P, and is operated by means of a cam-collar, K, on shaft B. A curved spring, a, attached to arm P and having end bearing against journal-box ll, serves to press said arm against the cam. As apparent, the grain from the hopper passes into cylinder 13' and is thence carried and discharged through the eye of the stationary grinding-disk by conveyer U to undergo the grinding process, after which it is discharged through spout 0, attaehed to the under surface, a, of casting A.

The driving-pulley is designated J. The manner of applying the latter to shaft B by means of a sleeve is obvious. A set-screw, D, serves to secure it on said shaft. Shaft B has a longitudinal play sufficient for the adjustment of the rotary grindingdiskj with relation to the stationary disk, and, as obvious, that portion is controlled by means of the set screw .9, which latter is provided with a handwheel, 71, and a lock-nut, 72.. The purpose of springs r is to permit a yielding of the parts that hold the rotary grinding'disk in position,

thus allowing foreign and refraetpry articles to pass between the two disks. lhisii'eature of the mill, we are aware, however, is not new, and therefore do not broadly make any claim thereto.

In a patent issued to us August 7, 1887, No. 387,257, for a double grimling-mill we have shown adjusting mechanism similar to that herein shown and deseribei'l, and we do not therefore claim herein such adjusting mechanism.

A cap may be substituted in lieu of cylinder 1 to complete the channel inclosing the conveyer C and the same result obtained, and wherever said cylinder is named in the claim as an element such modification,0r any modification substantially the same, is contemplated.

Centrally and vertically of upright A are shown strengthening or ornamental ribs V.

Having thus described our in ventiou, what we claim, and desire to protec t by 'l'na tcrs Patent, is

In a grinding-mill, the combination, with a suitably-charmeled superstrueture, A, of a re movable hollow cylinder, 13, one end of which is flanged and thereby adapted to support the stationary grinding-disk, said cylinder being also provided with an upper feed-opening, substantially as set forth.

GEORGE A Y MONI). A'Ll-lltl't'l RAYMOND. \Vitnesses:

JosErH RIDGE, FREDERICK (I. GOODWIN. 

